Raybestos 4440R R-Line Front Brake Drums and Rotor Axle Hubs are designed to match OE form, fit and function for the best operation and ultimate strength in braking. Developed from OE samples and made with G3000-qualified material, an advanced technology metallurgy which offers long lasting durability, these rear brake drums are 100 percent validated for balance, assuring smooth and quiet braking. Raybestos R-Line Drums meet the SAE standard for tensile strength, guaranteeing structural integrity and maximum service life for car and truck vehicles that require severe-duty performance.